were unofficial post stations

Shukuba

were post stations during the Edo period in Japan, generally located on one of the Edo Five Routes or one of its sub-routes. They were also called shukueki . These post stations were places where travelers could rest on their journey around the nation...

 along historical routes

Kaido

were ancient roads in Japan dating from the Edo period. Major examples include the Edo Five Routes, all of which started at Edo...

 in Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. These post stations formed organically along routes (such as the Tōkaidō

Tokaido (road)

The ' was the most important of the Five Routes of the Edo period, connecting Edo to Kyoto in Japan. Unlike the inland and less heavily travelled Nakasendō, the Tōkaidō travelled along the sea coast of eastern Honshū, hence the route's name....

 and the Nakasendō

Nakasendo

The , also called the , was one of the five routes of the Edo period, and one of the two that connected Edo to Kyoto in Japan. There were 69 stations between Edo and Kyoto, crossing through Musashi, Kōzuke, Shinano, Mino and Ōmi provinces...

) when the distance between two places was too far or when there were difficult passes nearby. Because they were not officially designated rest areas, travelers along the roads were not allowed to stay in these post stations. Sometimes the Japanese is shortened to 間宿.